If you compiled the xdebug module and see the following in your log file:
Failed loading /Applications/XAMPP/xamppfiles/lib/php/php-5.3.0/extensions/no-debug-non-zts-20090626/xdebug.so: dlopen(/Applications/XAMPP/xamppfiles/lib/php/php-5.3.0/extensions/no-debug-non-zts-20090626/xdebug.so, 9): no suitable image found. Did find:
/Applications/XAMPP/xamppfiles/lib/php/php-5.3.0/extensions/no-debug-non-zts-20090626/xdebug.so: mach-o, but wrong architecture
Just download the pre-compiled module from Komodo Debugger Extensions.
For context, here are some directions.